amansinha100 commented on a change in pull request #1466: DRILL-6381: Add
support for index based planning and execution
URL: https://github.com/apache/drill/pull/1466#discussion_r228342002
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/mergereceiver/MergingRecordBatch.java
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@@ -535,7 +535,10 @@ public FragmentContext getContext() {
@Override
public BatchSchema getSchema() {
- return outgoingContainer.getSchema();
+ if (outgoingContainer.hasSchema()) {
+ return outgoingContainer.getSchema();
+ }
+ return null;
Review comment:
The null value could occur for example when even though the
`VectorContainer` has vectors but the operator has not yet called
`buildSchema()` on the container. There's a `Preconditions.checkNotNull` in
`VectorContainer.getSchema()`.
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